Specifications

Jumper 25
Instruction Man u al
15
PUSHROD INSTALLATION

1) Locate two nylon clevises and two ny- lon
keepers from the nylon parts tree.

2) Install the elevator pushrod into the
fuse- lage. To help make installation easier,
thread string down through the elevator push-
rod ex its and into the servo compartment in
the fu se lage. Tie the thread to the thread ed
pushrod wires of the elevator pushrod. Pull
the pushrod through the exit slots.

3) Thread the two nylon clevises onto the
thread ed wires. Attach the clevises to the
eleva- tor control horns. You may  nd it nec-
es sary to make slight bends in the wires so
they will align with the control horns without
binding.

5) Install an adjustable servo connector
in the hole closest to the center of the rud-
der servo arm. You need to use a “dual type”
servo arm. Install the connector using the
same tech nique as with the throttle.

6) Connect the elevator and rudder servos
to your radio’s receiver and turn on the sys tem.
Set the trim tabs on the trans mit ter to neutral
and center the servo arms. The el e va tor and
rudder servo arms should be per pen dic u lar
to the servos.

7) One at a time, hold the pushrods in po-
sition over the respective servos to check
for proper servo direction. If any servo turns
in the wrong direction, switch your radio’s
re vers ing switches as nec es sary to achieve
the cor rect direction.

8) Insert the nose gear pushrod wire
through the adjustable servo connector on
the rud der servo arm. Hold the nose gear
assembly in the neutral position and tighten
the set screw in the servo con nec tor. When
sat is  ed, cut off the excess wire.

9) With the elevator in neutral, mark where
the pushrod wire crosses the servo arm. At
the mark you just made, use a pair of pliers
and bend the wire up 90 degree, making an
“L” shape.

10) Remove the servo arm from the servo
and insert the wire through the outer most
hole. You may need to enlarge the hole so the
wire will  t through. Install one nylon keep er
on the wire and cut off the excess using wire
cutters. . .

11) Repeat steps #9 - #10 for the rudder
pushrod. Notice the position of the servo arms
on the servos.
See picture as follow.

4) Repeat the steps above for installing the
rud der pushrod.
See  g.19below.
Elevator pushrod
Clevis
Rudder pushrod
Clevis
Control horn
Rudder
Elevator
throttle
Switch